Slotting attachment for screw-machines



(No Model.) 4 Sheets-Sheet 1.

` A. H. EDDY.

SLTTING ATTAHMENT FOR SCREW MAHINES.

No. 447,010. Patented Feb. 24,1891.

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4 Sheets-sheet 2.

A. 1-1. EDDY.

Patented Feb. 24,1891.

SLOTTIITC` ATTACHMENT EOE SCREW MACHINES.

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WMV/25555. dgp- Maman (No Modem sheets-sheet s.

A. H. EDDY.' SLCTTINC ATTACHMENT ECE SCREW MACHINES. No. 447,010. Patented Feb. 24,1891.

(No Model.) y 4 Sheets-Sheet 4.

A. H. EDDY. SLOTTING ATTACHMENT POB. SCREW MACHINES.

No. 447,010. y Patented Feb. 24, 1891.

UNITED STATES ARTHUR II. EDDY, OF HARTFORD, ASSIGNOR OF ONEHAIIF TO CHRISTOPHER PATENT OFFTC.

M. SPENCER, OF WTINDSOR, CONNECTICUT.

SLOTTING ATTACHMENT FOR SCREW-MACHINES.

SPECIFICATION forming part of Letters Patent No. 447,010, dated February 24, 1891.

Application filed October 2, 1890. Serial No. 366,898. (No model.)

To all whom t may concern:

Be it known that I, ARTHUR H. EDDY, a citizen of the United States, residing at Hartford, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Slotting vAttachments for Screw-Machines, of which the following is a specification.

My invention relates to improvements in slotting attachments for screw-machines, and the object of my improvement is to provide an attachment to screw-machines for automatically taking the screw from the tool which severs it from the rod and presenting it to a suitable saw forslotting.

In the accompanying drawings, Figure l is a front elevation, partly in central vertical section, of an automatic screw-1nachine with my slottin g attachment applied thereto. Fig. 2 is a side elevation of one of the cams. Fig. is a side elevation of the main portion of said machine on an enlarged scale. Fig. 4 is a partial front elevation and partial longitudinal section of parts of said machine, the same being on a scale smaller than Fig. 3, but larger than Figs. 1 and 2. Fig. 5 is a plan view of corresponding parts of the machine with some of the parts in horizontal section. Fig. 6 is an end view of the head, which carries the cutting-off tool. Fig. 7 is-a plan view of a detached portion of the head. Fig. 8 is a partial vertical section and front elevation oftportions of said machine with the parts in a different position from that shown in the preceding figures; and Fig. 9 is a side elevation of certain cams, the same being on a scale corresponding with that of Fig. 3.

Myinvention is applicable to any automatic screw-machine in which the stock is cut off within a hollow spindle. Y

The machine, as shown, is provided with a horiZontally-reciprocating carriage A and a vertically reciprocating carriage B, upon which is mounted the straightening and feeding devices, the carriage A bein g reciprocated by means of cams on the cam-wheel C, while the vertical carriage is raised by means of the cam D on the shaft E.

The revolving spindles l0, 1l, and 12 are provided with suitable tools or heads for turning a sliding tool-carriage 14, mounted to slide' in a suitable slot transversely to said head and bearing a cutting-off tool l5. It is also provided with a longitudinal slot, in which the cam 10 slides, as most clearly shown in Fig. (5. The operative faces of this cam 16 are formed on the edges of the inclined slot, through which a screwlS passes into the sliding carriage, so that when the sliding cam is moved longitudinally in the head the sliding tool-carriage is moved transversely thereto. This cam 1G is provided with a grooved sleeve 19 for engagement with a shipper 20, said shipper being operated by means of cams on the cam-wheel F.

This particular machine and tool-head are not of my invention; but as said tool-head forms an element of my combination I have thus described it in detail, my attachment being designed for taking the screws from said head as they are severed from the stock by the cutting-off tool in said head.

To the frame G of the machine I pivot a swinging frame 2l, as at 22, said frame being provided with a downwardly-extending arm 23 for being engaged by the cam 24 on the shaft E. lVithin the upper part of said frame 2l I arrange the slide 25, the same being hollow at its front end, so as to receive and hold a screw, and slotted longitudinally on its upper side to receive the knockout 26, as shown. Said knockout is provided at one end with a lug 27, and it is fit-ted so as to slide loosely within its slot.

Near the end of the shaft E, I pivot a T- lever 28 to a loose sleeve 29, and at the eifds of said sleeve I secure the cams 30 and 3l to the shaft E, so that they revolve therewith. These cams are for bearing alternately upon the respective ends of the head or cross-arm 32 of said T-lever for reciprocating said lever, the cams being shaped so as to give to said lever the respective strokes hereinafter 3o Fig. S.

described. 'lhe upper end of the "llever is connected by means ol` a pivoled link lil to a block 3l, which is clamped upon or secured to the slide 25.

At another pointon thetrame G in suitable l the frame 2l in such a direction as to keep l its arm il.) in contact with the eam lt. 'lhe cam SO operates the Tslever in the direction to carry the slide Q5 forward, and the cam lll operaies it to carry the slide in the reverse direction. About the time that the cams on zo the cam-wheel l move the shipper 2t) in thc l claim as my inventiona l. 'lhe combination ot` the slide 25, the T- lever 2S, and the cams 3l) and ill, arranged to act alternately on thc head or cross-arm ot' the T-lever t'or reciprocating said slide, substantially as described, and for the purpose spceitied.

the cam itl will have carried the slide forward, so that its hollow end receives the end ofthe screw, as shown in Fig. S. lVhen the slide is being thus presented to the screw, its end engages the end ot' the knockout and forces the knockout into the slide, so as to admit. the screw, as shown in said After the cutting-ott tool has severed the screw from the stock the cam ill acts to withdraw the slide and carry it back 1- 1to bring the slide forward again and presentthe screw-head to the saw, the depression?) in the edge ot' the cam all (see Figs. il and tl) perw mitting the head or cross-arm l2 ot the Tlcver to thus move. The saw is driven by means ot' a suitable belt running over the pulley Sti. 'l`he projection e on the cam l, which follows the depression t; then acts to move the l'le ver and slide 25 back away from the saw and to bring the lug or projection 27 of the knockout against the rear bearing SS ot' the frame 2l and force the forward end of the knockout near enough to the end ot the slide to discharge the screw, this position of the knockout within the slide being shown in Fig. t. When the cam 2t passes the end of the arm 22.3, the frame 2l. swings back again into its former position to bring the slide into alignment with the hollow spindle l2.

f. 'lhe combination of the swinging t'ramc 21, the slide 25, mounted in said traine, the T- lever 2S, the cams 3() and 3l Afor actingthereon, and the cani Jltor moving said frame, substantially as described, and for the purpose specified.

2l. The combination ot` the swinging frame 2l, the cam Z-t, the slide 25, mounted in said frame, the T-lever 2S, the cams 30 and 2li. lor acting thereon, the hollow spindle l2 ot' a screw-machine, and the saw 3T, arranged by the side ot said spindle, substantially as de scribed, and .[i'or the purpose specified.

Yt. The combination ot` the hollow spindle l 2, its reciprocating cnttingolt tool, the reciproeating slide 25, and mechanism t'or opcrat ing said slide for presenting it to the screw within saidspindle,substantiallyasdeserbed, and for the purpose specified.

5. The combination of the slide 25, the T- lever 2S, connected to said slide, the cam Ilo, having the tail o., and the cam ill, having the depression l and following rise or projection c, substantially as described, and for the purpose spccitied.

(i. 'lhe combination of the swinging frame 2l, the slide 25, mounted therein, and mechanism for rticiprocating said slide and for rocking said swing-trame, substantially as described, and for the purpose specified.

7. The combination of the spindle l2 ot' a screw-machine, within which the screw is cut from the stock, the revolving cutter 157, set to one side ot said spindle, the swinging t'ramc l, thc slide 25, mounted therein, and mechanism for reciprocating said slide and rocking said frame to pl'esent the slide lirst tothe spindle and then to the saw, substantially as described, and ii'or the purpose specited.

The combination otthe spindle eta screwmachine, within which the screw is cut from the stock, the slide 25, mounted in a suitable [ra-me, the knockout 2G, provided with a lug 27 tor engaging said frame, and mechanism for reciprocating said slide, substantially as described, and t'or the purpose specilled.

AR'lllUlt ll. EDDY.

Witnesses:

Janus Simi-uno, JonN Eon/anos7 Jr.

IOO 

